ATOMIC STRUCTURE
1. Name the three particles
of the atom and their respective charges are:
a.
b.
c.
2. The number of protons in one atom of an element
determines the atom’s
, and the number of electrons determines
of an
element.
3. The atomic number tells you the number of in one atom of an element. It also tells you
the number of in a neutral atom of that element. The atomic
number gives the “identity “of an element as well as its location on the Periodic
Table. No two different elements will have the atomic number.
4. The of an element is the average mass of an element’s
naturally occurring atoms, or isotopes, taking into account the of each isotope.
5. The of an element is the total number of protons
and neutrons in the of the atom.
6. The mass number is used to calculate the number of in one atom of an element. In order to
calculate the number of neutrons you must subtract the from the .
7. Give the symbol and
number of protons in one atom of:
Lithium Bromine
Iron
Copper
Oxygen
Mercury
Arsenic Helium
8. Give the symbol and number of electrons in a
neutral atom of:
Uranium
Chlorine
Boron
Iodine
Antimony Argon
9. Give the isotope symbol and number of neutrons
in one atom of the following elements. Show your
calculations.
Barium
– 138 Sulfur – 32
Carbon
– 12 Hydrogen – 1
Fluorine
– 19 Magnesium
– 24
Silicon
- 28 Mercury – 202
10. Name the element which has the following
numbers of particles. Be specific. (Include charges and mass numbers where
possible.)
26
electrons, 29 neutrons, 26 protons
53
protons, 74 neutrons
2
electrons (neutral atom)
20
protons
86
electrons, 125 neutrons, 82 protons (charged atom)
0 neutrons
11. If you know ONLY the following
information can you always determine what the element is? (Yes/No).
number of protons
number of neutrons
number of electrons in a neutral atom
number
of electrons
Name:
On the Inside
Part l: Label the parts of this atom (nucleus, protons, electrons, neutrons)
Part 2: Answer these:
1. The subatomic particle with no electrical
charge is the 2. The subatomic particle with a positive charge is the 3. The
subatomic particle with a negative charge is the 4. There are the same number
of these two particles in an atom 
5. The atomic number is the same
as the number of
6. Where is most of the mass of an atom located?
7. Which particles account for the mass of the atom? (Atomic mass or mass number) and
8.Com lete the followin table
|
Symbol |
Atomic Number |
Number of
Protons |
Number of
Neutrons |
Number of
Electrons |
Mass |
|
|
9 |
|
|
|
|
|
|
|
|
|
|
|
9. The
atomic number is the number of
in one atom of an element. It
is also the number of 
in a neutral atom of that element. The atomic
number gives the "identity "of an element.
No two different elements will have theatomic number.
10. The
of an element
is the average mass of an element 's naturally occurring atoms, or isotopes,
taking into account theof each isotope.
11. 
In order to
calculate the number of neutrons you must subtract the from the
12. Give the symbol and number of protons in one atom of:
Lithium 
Mercury Iron
13. Com lete the table below.
|
Symbol |
Atomic
Number |
Mass
Number |
Number
of Protons |
Number
of Electrons |
Number
of Neutrons |
|
23 |
|
|
|
|
|
|
|
|
39 |
|
19 |
|
|
|
|
|
38 |
38 |
50 |
|
|
20 |
40 |
|
|
|
|
Ions |
|
|
|
|
|
|
+2 |
|
|
|
|
|
|
-1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Isoto es |
|
|
|
|
|
|
|
|
110 |
47 |
|
|
|
36S |
|
|
|
|
|
|
26M |
|
|
|
|
|
14. Draw a Bohr model for the following:
Argon (18) Magnesium (12)
15. Complete the following with the terms "new element", ion, isotope, or molecule.
Name: Period: Date:
Atomic Structure
You can become mote fafY1iliar with the atomic stfucture of some elements by completing the chart. You have been given enough inf0Émation to fill in all the blahks. (There is no need to use a periodic table.)
|
Sub stance |
S ymbol |
Atomic Number |
Mass Number |
Number of Protons |
Number of N
eutrons |
Number of
electrons |
|
H e Iium |
|
2 |
|
|
|
|
|
M a gne sium |
|
12 |
|
|
12 |
|
|
Zinc |
|
30 |
65 |
|
|
|
|
Bromine |
|
|
80 |
|
|
35 |
|
A luminum |
|
|
|
13 |
14 |
|
|
U ranium |
|
|
|
|
|
92 |
|
S o d ium |
|
11 |
|
|
12 |
|
|
Hydrogen |
|
1 |
1 |
|
|
|
|
C a lc ium |
|
|
40 |
20 |
|
|
|
S ilver |
|
|
|
47 |
61 |
|
|
M ercury |
|
80 |
201 |
|
|
|
|
Iodine |
|
|
127 |
53 |
|
|
|
P o tassium |
|
|
|
|
20 |
19 |
 |
|
|
|
|
Physical Science Name/Per/Due date______________
Valence Electron Practice
Directions: Give the total number of electrons and the number of valence electrons for each element listed below.
1. Hydrogen 2. Lithium
3. Beryllium 4. Carbon
5. Fluorine 6. Neon
7. Magnesium 8. Chlorine
9. Arsenic 10. Krypton
11. Barium 12. Tin
13. Iodine 14. Aluminum
Directions: Give the element names for the element in the given period with the given number of valence electrons.
15. 2nd period, 5 valence electrons 16. 5th period, 1 valence electron
17. 3rd period, 7 valence electrons 18. 6th period, 8 valence electrons
19. 4th period, 3 valence electrons 20. 3rd period, 6 valence electrons
PART
I. Answer the questions based on the
above reading.
1. What is an isotope?
_____________________________________________________________
________________________________________________________________________________
2. What does the number next to isotopes
signify?
_______________________________________
________________________________________________________________________________
3. How can you tell isotopes of the same element
apart?
__________________________________
________________________________________________________________________________
PART II. For each of the following isotopes, write the
number of protons, neutrons, and electrons.
Assume all atoms are neutral.
|
|
Carbon-12 |
Carbon-13
|
Carbon-14 |
|
# of protons |
|
|
|
|
# of neutrons |
|
|
|
|
# of electrons |
|
|
|
|
|
Chromium-58 |
Chromium-63
|
|
# of
protons |
|
|
|
# of
neutrons |
|
|
|
# of
electrons |
|
|
|
|
Nitrogen-15 |
Nitrogen-20
|
|
# of
protons |
|
|
|
# of
neutrons |
|
|
|
# of
electrons |
|
|
|
|
Sulfur-23 |
Sulfur-25
|
|
# of protons |
|
|
|
# of neutrons |
|
|
|
# of electrons |
|
|
|
|
Selenium-50
|
Selenium-55 |
|
# of protons |
|
|
|
# of neutrons |
|
|
|
# of electrons |
|
|
|
|
Sodium-12 |
Sodium-20
|
|
# of
protons |
|
|
|
# of
neutrons |
|
|
|
# of
electrons |
|
|
PART III.
Fill in the isotope names and any
missing information on the chart. Use
your periodic table and the information provided. Assume all atoms are neutral.
|
|
|
|
|
# of
protons |
25 |
|
|
# of neutrons |
17 |
15 |
|
# of
electrons |
|
|
|
|
|
|
|
# of protons |
32 |
|
|
# of neutrons |
30 |
32 |
|
# of electrons |
|
|
|
|
|
|
|
# of protons |
|
|
|
# of neutrons |
48 |
51 |
|
# of electrons |
|
46 |
|
|
|
|
|
# of protons |
|
|
|
# of neutrons |
113 |
111 |
|
# of electrons |
55 |
|
|
|
Iron- |
Iron- |
|
# of protons |
|
|
|
# of neutrons |
27 |
30 |
|
# of electrons |
|
|
|
|
Iodine- |
Iodine- |
|
# of protons |
|
|
|
# of neutrons |
32 |
35 |
|
# of electrons |
|
|
|
|
Germanium- |
Germanium- |
|
# of protons |
|
|
|
# of neutrons |
33 |
36 |
|
# of electrons |
|
|
|
|
-10 |
-12 |
|
# of protons |
|
6 |
|
# of neutrons |
|
|
|
# of electrons |
6 |
|
|
|
-54 |
-56 |
|
# of protons |
24 |
|
|
# of neutrons |
|
|
|
# of electrons |
|
|
|
|
-22 |
-25 |
|
# of protons |
|
|
|
# of neutrons |
|
|
|
# of electrons |
11 |
|
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